MIME type identifier
Drop a file → detect MIME type from magic bytes (first 16 bytes). Matches 19 common formats. MP4 detection only matches one of several possible ftyp box layouts, so some MP4 variants won't be recognised — fall back to the browser-reported type.
About this tool
MIME type identifier is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
Category: Encoding & Conversion. Browse more Encoding & Conversion tools.